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Distributed energy storage system for improving confidence capacitance of photovoltaic power station

A distributed energy storage and photovoltaic power station technology, applied in the field of new energy power generation, can solve the problems of single energy storage control mode and inability to use photovoltaic power generation, so as to improve the confidence capacity, realize the maximum utilization of optical resources, and high reliability Effect

Inactive Publication Date: 2016-01-13
CHINA ELECTRIC POWER RES INST +2
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  • Claims
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AI Technical Summary

Problems solved by technology

The existing scheme connects a single point to the large-capacity energy storage system at the grid-connected point of the power station. Under this method, the energy storage control method is single, and when the inverter is not working, the photovoltaic power generation cannot be utilized

Method used

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  • Distributed energy storage system for improving confidence capacitance of photovoltaic power station
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  • Distributed energy storage system for improving confidence capacitance of photovoltaic power station

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Embodiment Construction

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0035] The invention provides a distributed energy storage system that improves the confidence capacity of photovoltaic power plants. Based on the electrical structure and control method of photovoltaic power plants, the access mode and control system of the energy storage system are designed, which reduces system costs and improves system reliability. , and a more effective control effect can be obtained.

[0036] Examples of distributed energy storage systems in the present invention are figure 1 As shown, specifically:

[00...

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Abstract

The invention provides a distributed energy storage system for improving confidence capacitance of a photovoltaic power station. The distributed energy storage system comprises a light storage monitoring system and at least two light storage units, wherein the light storage monitoring system is connected with a power grid management system of the photovoltaic power station and used for receiving a power grid dispatching command and issuing a power adjustment command to the light storage units; each light storage unit comprises a battery energy storage unit, a bidirectional DC / DC converter, a photovoltaic module and a photovoltaic grid-connected inverter; and the light storage monitoring system comprises the photovoltaic station supervisory control and data acquisition (SCADA), a light storage combined power control unit, a battery unit management device and a battery unit integrated management device. Compared with the prior art, the distributed energy storage system for improving the confidence capacitance of the photovoltaic power station, provided by the invention has the advantages that the distributed energy storage system is applicable for the photovoltaic power station on a large land, the grid connection of the energy storage unit is achieved by means of the existing grid-connected photovoltaic inverter, the cost of the energy storage system is reduced, and the reliability of the light energy system is improved through distributed access and control of the energy storage unit.

Description

technical field [0001] The invention relates to the technical field of new energy power generation, in particular to a distributed energy storage system for improving the confidence capacity of a photovoltaic power station. Background technique [0002] my country's photovoltaic power generation presents a development form of both centralized and distributed, and my country's photovoltaic power generation installed capacity is in a stage of rapid growth. In areas rich in concentrated photovoltaic power generation, photovoltaic power generation has become one of the main power sources in the region, and its intermittent and fluctuating characteristics have brought pressure to the dispatching operation of the power grid. The confidence capacity of photovoltaic power generation is one of the important indicators to measure the impact of photovoltaic power generation on the grid, which represents the capacity or load of conventional units that can be replaced by photovoltaic pow...

Claims

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Application Information

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IPC IPC(8): H02J15/00H02J3/46H02S10/20
CPCY02E10/56Y02E70/30
Inventor 田立亭李建林李相俊惠东张节潭杨立滨张桂红姜纯
Owner CHINA ELECTRIC POWER RES INST
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